Re: D15b O2 sensor
Get whatever 02 sensor is for your ECU. If you use a Z6 ECU, get one for a Z6 (the 4 wire). There are universal fit ones on eBay for a decent price, just make sure you get a Denso or something. The P08 the D15B originally ran on used a 1 wire sensor...
A lot of people neglect to change their O2 on time and it can get lazy as it wears out. How old is yours....?